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Wireing up a DVC sub


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homerb 
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Posted: April 15, 2006 at 9:59 AM / IP Logged  

Hay guys

I wuld like to know the correct way 2 wire up a sub with 4 ohm dual voice coils.

The sub is a MA Audio MA100XE 10" 300W RMS @ 4 ohms sub with 4 ohms DVC.

It is 2 b connected to a Earthquake Powerhouse 2.3 2 channel amp that puts out 300 W RMS @ 4 ohms mono. I want 2 connect the sub to the amp in series/parallel so its impidence stays 4 ohms.

I'm  a little confused with the wireing diagram. I connect 1 of the 2 +ive/-ive terminals to the +ve and -ive in the amp but what about the other set of terminals?? should they be connected +ve to -ive ot each other or to the 1st terminal that is connected to the amp?

Could you please tell me which of the 2 diagrams below is correct.

Thanx 4 the help.Wireing up a DVC sub -- posted image.

DYohn 
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Posted: April 15, 2006 at 10:34 AM / IP Logged  
No, you cannot wire both voice coils and keep the system at 4-ohms.  Your options are 2-ohms (voice coils in parallel) or 8-ohms (voice coils in series.)  You can operate using only one voice coil to place a 4-ohm load on the amp, but be aware doing this will cut the speaker's power handling capability in half (in your case to 150 watts.)
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homerb 
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Posted: April 15, 2006 at 10:44 AM / IP Logged  

so nither of the above diagrams are correct??

do you mean i hav 2 just connect 1 +ve -ve terminal 2 the amp and leave the other 1 as it is?

if i run it in 2 ohms on the amp which is putting out 300W @ 4 ohms mono will that damage the sub???

can i run 2 of the above subs connected in 2 ohms on the amp??

it puts out 130W x 2 channels @ 2 ohms

how exactly do i connect it to keep the impedence 2 ohms?

homerb 
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Posted: April 15, 2006 at 11:08 AM / IP Logged  

ok i think i'm getting it now

i wire both subs like diagram '2' and connect each to 1 channel of the amp that is putting out 130W per channel at 2 ohms. if as u say the RMS rating on the sub goes down to 150W @ 2 ohms then they should both run fine on the 2 channel amp. hav i got it right???

DYohn 
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Posted: April 15, 2006 at 11:29 AM / IP Logged  

You have 2 subs?  Why didn't you say so.  Look to the left, there is an excellent woofer wiring link under "Car Audio."  It tells you to wire like this and connect it in mono to the bridged outputs of your amp:

Wireing up a DVC sub -- posted image.

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homerb 
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Posted: April 15, 2006 at 11:43 AM / IP Logged  

But if i wire it in this way wont my amp need to put out around 600W RMS @ 4 ohms to run both the subs???

i thought the power rating had 2 be added up if i wired them in combination series/parallel

i.e. 2 x 300W = 600W @ 4 ohms

geepherder 
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Posted: April 15, 2006 at 2:37 PM / IP Logged  
I don't understand your question.  You say your amp puts out 300 watts mono at 4 ohms, right?  That means each sub will get 150 watts for a total of 300 watts.
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homerb 
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Posted: April 15, 2006 at 9:52 PM / IP Logged  

Yup ur exactly right geepherder. thats what i'm sayin too. i dont see how i can wire 2 300W @ 4 ohm subs in series/parallel like DYohn suggested when my amp only puts out 300W. as i understand things i'll need an amp that puts out close to 600W for the 2 subs.

but if i wire each sub individuly in parallel (my diagram 2) then the impedence cums down to 2 ohms for each sub so as far as i can understand the RMS power requirement should half too to around 150 watts. so i should then be able to hook  up both subs each to 1 channel of the 2 channel amp as it puts out 130W per channel @ 2 ohms. is that ok??

stevdart 
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Posted: April 15, 2006 at 10:37 PM / IP Logged  
Before more responses here, see the other open thread on this subject " How is subs RMS rating calculated? "
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mr.audiophile 
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Posted: April 15, 2006 at 10:40 PM / IP Logged  
fisrt things first. If your running a 4 ohm dvc sub. It will not operate at 4 ohms. Only 2 or 8. Yes you can wire each sub to each at 2 ohms. But if your only running 130 watts rms out of each channel and your subs are 300 watts rms, you'll wreck your subs. That will cause clipping. If your amp will run at 2 ohms bridged, you should just run 1 sub. Its better to over power your sub then under power it.
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